In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux

Lee, Hyunhwa; Song, Kyoungjae; Lee, Moonsang; Park, Jeong Young

doi:10.1002/advs.202001148

Cited by 30 publications

(27 citation statements)

References 55 publications

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“…Both the IPCE and | E |-field distributions directly reflect the fact that the size of the plasmonic nanomaterial governs the hot hole injection and population, in excellent agreement with other theoretical studies. , Furthermore, it was noted that the electric field confinement encouraged resonant coupling between the LSPR phenomenon and surface charges, indicating that the hot hole flux at the edge site is accelerated. This corresponds to our previous research . In addition, it is evident that the spatial density of the hot spots of the smaller Au is higher, because the number of its outermost edge increases despite the identical surface coverage, as shown in Figure S8.…”

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confidence: 91%

“…This corresponds to our previous research. 50 In addition, it is evident that the spatial density of the hot spots of the smaller Au is higher, because the number of its outermost edge increases despite the identical surface coverage, as shown in Figure S8. We consider that the blue-shifted peak position and higher intensity in IPCE and IQE prove the evolution of a more energetic hot hole.…”

mentioning

confidence: 92%

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Plasmonic Hot Hole-Driven Water Splitting on Au Nanoprisms/P-Type GaN

Song

Lee

et al. 2021

ACS Energy Lett.

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While hot carrier generation from surface plasmon decay at the surface of a nanostructured metal offers a distinctive concept for boosting photoelectrocatalytic reactions, the nature of the plasmonic hot hole transfer based on the sizes of metallic nanomaterials has not been investigated in depth experimentally. Here, we report direct photoelectrochemical (PEC) experimental proof that the injection of plasmonic hot holes depends on the size of the metallic nanostructures. PEC results clearly indicate that a plasmonic template with smaller Au nanoprisms exhibits higher external and internal quantum efficiencies, leading to a significant enhancement of both oxygen evolution and hydrogen evolution reactions. We verified that these outcomes stemmed from the enhanced hot hole generation with higher energy and transfer efficiency driven by enhanced field confinement. These findings provide a facile strategy by which futuristic photocatalysis and solar energy conversion applications based on plasmonic hot holes can be expedited.

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confidence: 91%

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confidence: 92%

Plasmonic Hot Hole-Driven Water Splitting on Au Nanoprisms/P-Type GaN

Song

Lee

et al. 2021

ACS Energy Lett.

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“…55,56 We believe that the hot carriers generated by light irradiation were the main factor that promoted the reaction of the 4-MBA molecule and induced the growth of nanoflakes 14,57 because light irradiation in the resonance band near Ag excited the surface plasmons better and produced hot charge carriers that participated in the decarboxylation reaction of 4-MBA and the reduction reaction of Ag. 58,59 This conclusion could also be verified by adding a hot hole annihilator (Fig. S2e and S2f†) i.e.…”

Section: Resultssupporting

confidence: 54%

Confined growth of Ag nanoflakes induced by LSPR-driven carrier transfer in periodic nanopatterned arrays

Zhao

Zhang

et al. 2022

Nanoscale

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“…Hot hole and electron excitation in GaN-SP coupling systems have been reported in a serial of recent works. [55][56][57] Duchene et al proposed a plasmonic Au/p-GaN photocathode as a hot hole generator for CO 2 reduction in 2018. [58] The proposed photocathode is able to collect hot holes at least 1.1 eV below Au Fermi level.…”

Section: Sps Enhanced Gan-based Catalyzingmentioning

confidence: 99%

Progress of GaN‐Based Optoelectronic Devices Integrated with Optical Resonances

Zhao

Liu

Wang

2022

Small

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are even smaller, only a few MHz, which are far away from the requirement of fast and large data wireless transmission for VLC. [5] To enhance the data transmission rates, complex modulation schemes and/ or equalization have to be utilized, which, however, hinder the further developments and applications. In addition, Si-based optoelectronic devices, like Si PDs, a bluefiltering technology are still used currently for shorter wavelength visible light detection, which suffers from complexity and low light transmittance. Furthermore, considering the development and mature application of GaN-based devices, there is a trend to realize the multifunctional single chip integration. However, the relative low coupling efficiency in the GaNbased optoelectronic devices still cannot meet the requirements. In this case, it is important to develop novel GaN-based optoelectronic devices with superior performances as alternative for miniaturization, simplification, and integration. To solve these problems, the concept of incorporating GaN-based devices with exotic optical resonances has been proposed. [5] Surface plasmons (SPs), microcavities, such as whispering gallery modes (WGMs) and distributed Bragg reflectors (DBR) are common optical resonant structures to improve the performances of GaN-based devices. [6][7][8][9] SPs are intrinsic electromagnetic modes excited at the metal-dielectric interfaces, accompanied with the collective oscillation behaviors of free electrons on the metal-side surfaces. [10] Giant electric field enhancement generates at the interface with exponentially decay along the perpendicular direction. Inside the GaN-based devices, the excitation of SPs can greatly enhance the density of states of the electron-hole pairs and improve the competitiveness of the radiative recombination to the non-radiative recombination. [11] It has also been demonstrated tremendously in early works that using SPs enables a path to break the optical diffraction limit of the semiconductor lasers and boost the light-matter coupling intensities in subwavelength dimensions. [11][12][13][14][15][16][17] In addition, GaN-based microcavities, such as photonics crystals, DBR, and micro disks, can confine and manipulate light. [18][19][20] By matching one or more dimensions of the cavities to the wavelength of the confined light, exotic effects can be produced, such as enhanced luminescence, directional emission, low-threshold lasing, etc. When light illuminates microcavities, the confined electron-hole pairs interact with the cavity photons. Their interaction rate relative to the average Being direct wide bandgap, III-nitride (III-N) semiconductors have many applications in optoelectronics, including light-emitting diodes, lasers, detectors, photocatalysis, etc. Incorporation of III-N semiconductors with high-efficiency optical resonances including surface plasmons, distributed Bragg reflectors and micro cavities, has attracted considerable interests for upgrading their performance, which can not only reveal the new coupling mechanism...

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In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux

Cited by 30 publications

References 55 publications

Plasmonic Hot Hole-Driven Water Splitting on Au Nanoprisms/P-Type GaN

Plasmonic Hot Hole-Driven Water Splitting on Au Nanoprisms/P-Type GaN

Confined growth of Ag nanoflakes induced by LSPR-driven carrier transfer in periodic nanopatterned arrays

Progress of GaN‐Based Optoelectronic Devices Integrated with Optical Resonances

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